I love this – perhaps because I hate reading music so much – and I’m primarily a visual person. Sure, it doesn’t show nuances but visual fade outs and other techniques could be added to achieve this? Anyway, apart from being a more intuitive/visual way of writing music, I think the animation helps you hear things you would not have noticed unless you saw it.
Have a look/listen (the music is yummy too) You’ll need QuickTime to use it: